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Method for large-scale preparation of modified activated carbon

A large-scale preparation, activated carbon technology, applied in chemical instruments and methods, carbon compounds, inorganic chemistry, etc., can solve the problems of unreliable loading, unsatisfactory catalysis, etc., achieve strong catalytic degradation ability, simple and easy preparation method, environmental protection friendly effect

Active Publication Date: 2019-08-16
SOUTHEAST UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In order to solve the problem of easy saturation of activated carbon adsorption, researchers have developed activated carbon loaded with catalysts, but all these methods have problems of unreliable loading and unsatisfactory catalysis.

Method used

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  • Method for large-scale preparation of modified activated carbon
  • Method for large-scale preparation of modified activated carbon

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] The preparation method of this implementation example is realized like this, comprises the steps:

[0030] Get 1000mL concentration and be the aqueous solution of 0.5mg / ml graphene oxide, ultrasonic dispersion 1h, obtain the dispersion liquid of uniform graphene oxide; Then add 50mg tungsten oxide (WO 3 ) nanoparticles and ultrasonically disperse them for 0.5 h, then add 3.5 g of graphene while stirring, and continue stirring for 10 h; finally, immerse the commercial activated carbon in the above mixed dispersion, take it out after the adsorption is saturated, and place it in a 40°C oven for drying.

[0031] figure 1 It is the scanning electron micrograph of unmodified activated carbon; figure 2 Scanning electron microscope picture of modified activated carbon, it can be seen that tungsten oxide particles are loaded on activated carbon.

Embodiment 2

[0033] Get 1000mL concentration and be the aqueous solution of 1mg / ml graphene oxide, ultrasonic dispersion 1h, obtain the dispersion liquid of uniform graphene oxide; Then add 1000mg manganese oxide (MnO 2 ) nanoparticles and ultrasonically disperse for 1 h, then add 3 g of graphene while stirring, and continue stirring for 5 h; finally, immerse the activated carbon in the above mixed dispersion, take it out after the adsorption is saturated, and place it in an oven at 250 ° C for drying.

[0034] The resulting SEM image is similar to figure 2

Embodiment 3

[0036] Get 1000mL concentration and be the aqueous solution of 3mg / ml graphene oxide, ultrasonic dispersion 2h, obtain the dispersion liquid of uniform graphene oxide; Then add 15g iron oxide (Fe 2 o 3 ) and ultrasonically disperse the nanomaterials for 1 h, then add 1.5 g of graphene while stirring, and continue stirring for 3 h; finally, immerse the activated carbon in the above mixed dispersion, take it out after the adsorption is saturated, and place it in an oven at 150 ° C for drying.

[0037] The resulting SEM image is similar to figure 2

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Abstract

The invention discloses a method for large-scale preparation of modified activated carbon. The method for large-scale preparation of modified activated carbon comprises the following steps: 1) ultrasonically dispersing an aqueous solution of graphene oxide to obtain a uniform dispersion of graphene oxide; 2) then adding metal oxide into the graphene oxide dispersion liquid, and carrying out ultrasonic dispersion; 3) then adding graphene into the graphene oxide / metal oxide dispersion liquid, and stirring the mixture at room temperature to obtain a uniform graphene oxide / metal oxide / graphene dispersion liquid; and 4) fully immersing the activated carbon into the dispersion liquid, taking out the activated carbon after adsorption saturation, and drying the activated carbon. The modified activated carbon has the advantages of high specific surface area, strong adsorption capacity, difficulty in saturation, strong catalytic degradation function and no secondary pollution in use, and the preparation method is simple and feasible, convenient to operate and high in cost performance, and is very suitable for industrial production.

Description

technical field [0001] The invention relates to a technology capable of preparing modified activated carbon on a large scale, and belongs to the technical field of controllable and continuous synthesis of carbon materials. Background technique [0002] With the development of industry, a large amount of volatile organic pollutants (VOC) escape into the atmosphere, causing serious air pollution. For VOC in the air, the commonly used adsorption material on the market is activated carbon, including activated carbon particles and activated carbon fibers. Although activated carbon has excellent adsorption performance, it has the problem of easy saturation of adsorption and difficult desorption after saturation, which will greatly increase the cost of use and require continuous replacement of activated carbon. In order to solve the problem of easy saturation of activated carbon adsorption, researchers have developed activated carbon loaded with catalysts, but all these methods ha...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B32/354C01B32/198C01B32/194
CPCC01B32/354C01B32/198C01B32/194Y02A50/20
Inventor 毕恒昌孙立涛
Owner SOUTHEAST UNIV
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